This issue is very relevant, since safety and reliability play a paramount role, especially when it comes to a production scale. A few years ago, a cast -iron valve, suitable for pipes of different diameters – from 15 to 2000 mm, was used as the main locking reinforcement. However, Western countries have long switched to ball valves, considering them more convenient. So what to choose: a valve or a crane?
To begin with, both of these locking elements are able to work under high pressure, and in general in parameters are very close to each other. But at the same time, the ball crane has a number of distinguishing features, and first of all, this is the material from which it is made. If earlier it was produced from various non -ferrous metals, today the preference is given to steel, due to which the “ball” has become more durable and durable.
In many respects, it is the need for an annual revision, replacing and lifting uprs, shallow of sealing surfaces reduces interest in the valve, because this is extra costs. At the same time, the ball crane does not need maintenance throughout the entire time of operation, but it must be remembered that it should always be in working condition, otherwise its tightness may decrease due to abrasive wear of the ball.
The price of a ball crane is higher than for a valve, but this is due to the fact that the working pressure is the second – only 16 kgsm kV and from -30 to 200 degrees. Of course, if you try, it is really possible to find a valve with improved technical characteristics, but its price will be much larger.
The tightness is also different, which in the crane is much higher. It’s all about the “ball” design, the basis of which is a ball with a chrome surface. It fit tightly to sealing gaskets, ensuring a reliable overlap of water supply. It should be noted that the tightness of the valves always left much to be desired, which often led to accidents and the course of the working flow. And this, in turn, entails undesirable financial losses for the enterprise.
By their mass, the cast -iron valve is larger, respectively, its installation is associated with certain difficulties. The ball crane has a smallest capacity, the same can be said about dimensions and weight. Naturally, it is much more convenient to use an economical and durable “ball” than a bulky and unreliable valve. In addition, the crane has several fastening options and a high overlap speed, which adds advantages to it.
Again, it is impossible to sharply open or block the valve, which significantly limits its use as a shut -off valves, when there is a need to quickly overlap the flow of coolant. The ball crane also has a small drawback, which consists in the fact that there is a cavity between the crane housing and the shut -off ball, where even after the full drain of the pipeline, liquid remains.
We conclude that most of the parameters of the ball crane is a more profitable acquisition, especially when it comes to operation in high pressure and temperature conditions. He is not picky, provides a high level of security and last for many years, although its cost is slightly larger than that of any other locking element. Well, to adjust the flow with a temperature of up to 120 degrees, the shutter is almost perfect.